ASTM E2792-13

Standard Test Method for Determination of Hydrogen in Aluminum and Aluminum Alloys by Inert Gas Fusion

SIGNIFICANCE AND USE
5.1 This test method is intended for the routine testing of aluminum and aluminum alloys to qualitatively determine the concentration of hydrogen in aluminum and aluminum alloys. It is not intended to verify compliance with compositional specifications because of the lack of certified reference materials. It is assumed that all who use this test method will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that the work will be performed in a properly equipped laboratory.
SCOPE
1.1 This test method applies to the determination of hydrogen in aluminum and aluminum alloys in concentrations from 0.05 mg/kg to 1 mg/kg.  
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Mar-2013
• ICS: 77.120.10 - Aluminium and aluminium alloys
• Technical Committee: E01 - Analytical Chemistry for Metals, Ores, and Related Materials
• Drafting Committee: E01.04 - Aluminum and Magnesium

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E2792 − 13
Standard Test Method for
Determination of Hydrogen in Aluminum and Aluminum
1
Alloys by Inert Gas Fusion
This standard is issued under the fixed designation E2792; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope the melting point under a flowing carrier gas atmosphere.
Hydrogen present in the sample is released as molecular
1.1 This test method applies to the determination of hydro-
hydrogenintotheflowinggasstream.Thereleasedhydrogenis
gen in aluminum and aluminum alloys in concentrations from
separated from other liberated gases such as carbon monoxide
0.05 mg/kg to 1 mg/kg.
and subsequently measured in a thermal conductivity cell.
1.2 This standard does not purport to address all of the
4.2 Calibration is made using gas dosing with either helium
safety concerns, if any, associated with its use. It is the
orhydrogenorreferencematerialsofknownhydrogencontent.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4.3 This test method is written for use with commercial
bility of regulatory limitations prior to use.
analyzers equipped to carry out the above operations automati-
cally.
2. Referenced Documents
2
2.1 ASTM Standards:
5. Significance and Use
E50 Practices for Apparatus, Reagents, and Safety Consid-
5.1 This test method is intended for the routine testing of
erations for Chemical Analysis of Metals, Ores, and
aluminum and aluminum alloys to qualitatively determine the
Related Materials
concentration of hydrogen in aluminum and aluminum alloys.
E135 Terminology Relating to Analytical Chemistry for
It is not intended to verify compliance with compositional
Metals, Ores, and Related Materials
specifications because of the lack of certified reference mate-
E177 Practice for Use of the Terms Precision and Bias in
rials. It is assumed that all who use this test method will be
ASTM Test Methods
trained analysts capable of performing common laboratory
E691 Practice for Conducting an Interlaboratory Study to
procedures skillfully and safely. It is expected that the work
Determine the Precision of a Test Method
will be performed in a properly equipped laboratory.
E1914 Practice for Use of Terms Relating to the Develop-
ment and Evaluation of Methods for Chemical Analysis
6. Interferences
3. Terminology
6.1 The elements ordinarily present in aluminum and alu-
3.1 Definitions—For definitions of terms used in this test minum alloys do not interfere.
method, see Terminology E135 and E1914.
7. Apparatus
4. Summary of Test Method
7.1 FusionandMeasurementApparatus—Automatichydro-
4.1 The specimen, contained in a high-purity graphite
gen analyzer, consisting of an electrode furnace or induction
crucible, is heated to just below the melting point to drive off
furnace; analytical gas stream; impurity removal systems;
the surface hydrogen. The sample is then heated to just beyond
auxiliary purification systems and either a thermal conductivity
cell hydrogen measurement system or an infrared hydrogen
measurement system. Several models of commercial analyzers
1
This test method is under the jurisdiction of ASTM Committee E01 on
are available and presently in use in industry. Each has its own
Analytical Chemistry for Metals, Ores, and Related Materials and is the direct
responsibility of Subcommittee E01.04 on Aluminum and Magnesium. unique design characteristics and operational requirements.
Current edition approved April 1, 2013. Published June 2013. Originally
Consult the instrument manufacturer’s instructions for opera-
approved in 2011. Last previous edition approved in 2011 as E2792-11. DOI:
tional details.
10.1520/E2791-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7.2 Graphite Crucibles, machined from high-purity graph-
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
ite. Use the crucible design(s) recommended by the manufac-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. turer of the instrument.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E2792 − 13
7.3 Quartz Crucibles, for analysis of steel reference mate- 10.5 Optimize the crucible pretreatment power settings
rials on some instrument types. Use the crucible design(s) (commonly called outgas), the surface and analysis power
recommended by the manufacturer of the instrument. settings, crucible pretreatment time and analysi
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E2792 − 11 E2792 − 13
Standard Test Method for
Determination of Hydrogen in Aluminum and Aluminum
1
Alloys by Inert Gas Fusion
This standard is issued under the fixed designation E2792; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method applies to the determination of hydrogen in aluminum and aluminum alloys in concentrations from 0.05
mg/kg to 1 mg/kg.
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
E50 Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials
E135 Terminology Relating to Analytical Chemistry for Metals, Ores, and Related Materials
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E1914 Practice for Use of Terms Relating to the Development and Evaluation of Methods for Chemical Analysis
3. Terminology
3.1 Definitions—For definitions of terms used in this test method, see Terminology E135 and E1914.
4. Summary of Test Method
4.1 The specimen, contained in a high-purity graphite crucible, is heated to just below the melting point to drive off the surface
hydrogen. The sample is then heated to just beyond the melting point under a flowing carrier gas atmosphere. Hydrogen present
in the sample is released as molecular hydrogen into the flowing gas stream. The released hydrogen is separated from other
liberated gases such as carbon monoxide and subsequently measured in a thermal conductivity cell.
4.2 Calibration is made using gas dosing with either helium or hydrogen or reference materials of known hydrogen content.
4.3 This test method is written for use with commercial analyzers equipped to carry out the above operations automatically.
5. Significance and Use
5.1 This test method is intended for the routine testing of aluminum and aluminum alloys to qualitatively determine the
concentration of hydrogen in aluminum and aluminum alloys. It is not intended to verify compliance with compositional
specifications because of the lack of certified reference materials. It is assumed that all who use this test method will be trained
analysts capable of performing common laboratory procedures skillfully and safely. It is expected that the work will be performed
in a properly equipped laboratory.
6. Interferences
6.1 The elements ordinarily present in aluminum and aluminum alloys do not interfere.
1
This test method is under the jurisdiction of ASTM Committee E01 on Analytical Chemistry for Metals, Ores, and Related Materials and is the direct responsibility of
Subcommittee E01.04 on Aluminum and Magnesium.
Current edition approved Nov. 1, 2011April 1, 2013. Published December 2011June 2013. Originally approved in 2011. Last previous edition approved in 2011 as
E2792-11. DOI: 10.1520/E2791-11.10.1520/E2791-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E2792 − 13
7. Apparatus
7.1 Fusion and Measurement Apparatus—Automatic hydrogen analyzer, consisting of an electrode furnace or induction
furnace; analytical gas stream; impurity removal systems; auxiliary purification systems and either a thermal conductivity cell
hydrogen measurement system or an infrared hydrogen measurement system. Several models of commercial analyzers are
available and presently in use in industry. Each has its own unique design characteristics and operational requirements. Consult
the instrument manufacturer’s instructions for operational details.
7.2 Graphite Crucibles, machined from high-purity graphite. Use the crucible design(s) recommended by the manufacturer of
the instrument.
7
...